Please update Roundcube Webmail to 1.6.15

Kent Brockman

• March 31, 2026 15:52

Hi team,

Could you please update Roundcube Webmail to version 1.6.15?

The current version (1.6.14, deployed with cPanel 134.0.12 – “CPANEL-52097”) is causing issues with IMAP searches when using UTF-8 characters (e.g. accents). In those cases, searches fail with:

UID SEARCH: Error in IMAP command UID SEARCH: Missing LF after literal size

This is creating some inconvenience and day-to-day usability issues for several clients.

It looks like this was recently addressed in 1.6.15 (released Mar 29):
https://github.com/roundcube/roundcubemail/releases/tag/1.6.15

Thanks!

• 

  William Del Piero cPanel Staff

  • March 31, 2026 16:29

  Hi,

  Thank you for reaching out to us about this.

  The issue you’re experiencing with IMAP searches failing for UTF‑8 characters in Roundcube 1.6.14 has been reported to our development team under the internal case ID CPANEL‑52180. Our developers are actively reviewing the fix introduced in Roundcube 1.6.15 and will incorporate it into cPanel once it has been fully tested and validated for compatibility.

  In the meantime, we do have a documented workaround available here:

  Mail search fails for non-ASCII characters in Roundcube 1.6.14

  Following the article will also allow you to subscribe for notifications so you’ll be alerted as soon as a permanent fix is released in a future cPanel update.

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• 

  Kent Brockman

  • March 31, 2026 17:36

  Thank you very much. I've downgraded that server to 11.110.0.91 cause it's a CentOS. I switched the upcp cron job to "0 3 30 * *" to wait for the updated release without overwriting Roundcube again.

  According to Roundcube staff, the fix is just to lines of code.

  Please update this thread, if possible, when the update is released.

  Thanks!! :-)

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• 

  cPRex Jurassic Moderator

  • April 06, 2026 19:09

  The update to Roundcube should be going out later this afternoon!

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